Hydroxyaldimine-containing polyurethane composition

An aldimine of Formula (III)

• wherein
• R1 and R2 either
• independently of one another in each case represents a monovalent hydrocarbon radical with 1 to 12 C atoms,
• or
• together represent a divalent hydrocarbon radical with 4 to 12 C atoms, which is part of an optionally substituted, carbocyclic ring with 5 to 8 C atoms;
• Y2 represents an n-value organic radical with 1 to 24 C atoms, which optionally contains nitrogen and/or oxygen atoms in the form of tertiary amino groups, or ether, ester, carbonate, amide, urethane or urea groups;
• E either represents a divalent hydrocarbon radical with 3 to 20 C atoms, or together with R11 represents a trivalent hydrocarbon radical with 3 to 20 C atoms, wherein E optionally contains heteroatoms in the form of ether-oxygen or tertiary amine-nitrogen,
• X represents O or S or N—R10 or N—R11,
• wherein
• R10 represents a monovalent hydrocarbon radical with 1 to 20 C atoms, which optionally contains at least one carboxylic acid ester, nitrile, nitro, phosphonic acid ester, sulfonic or sulfonic acid ester group, and
• R11 together with E represents a trivalent hydrocarbon radical with 3 to 20 C atoms, which optionally contains heteroatoms in the form of ether-oxygen or tertiary amine-nitrogen;
• and n represents 2 or 3 or 4.

A method for gluing a substrate S1 to a substrate S2, comprising:

• i) applying a composition to a substrate S1;
• and
• ii) bonding the applied composition to a substrate S2 within an open time of the composition;
• or
• i′) applying a composition to a substrate S1 and to a substrate S2;
• and
• ii′) bonding the applied composition together within an open time of the composition;
• wherein the substrate S2 is formed from the same or different material as the substrate S1, and
• wherein the composition comprises:
• a) at least one aldimine A of Formula (I),
• wherein n stands for 2 or 3 or 4,
• E either represents a divalent hydrocarbon radical with 3 to 20 C atoms, or together with R11 for a trivalent hydrocarbon radical with 3 to 20 C atoms, wherein E optionally contains heteroatoms in the form of ether-oxygen or tertiary amine-nitrogen,
• Y represents an n-value organic radical with 6 to 30 C atoms, which optionally contains nitrogen and/or oxygen atoms in the form of tertiary amino groups, or ether, ester, carbonate, amide, urethane or urea groups,
• X represents O or S or N—R10 or N—R11, wherein
• R10 represents a monovalent hydrocarbon radical with 1 to 20 C atoms, which optionally contains at least one carboxylic acid ester, nitrile, nitro, phosphonic acid ester, sulfonic or sulfonic acid ester group, and
• R11 together with E represents a trivalent hydrocarbon radical with 3 to 20 C atoms, which optionally contains heteroatoms in the form of ether-oxygen or tertiary amine-nitrogen;
• and
• b) at least one polyisocyanate P.